What is the law that states momentum cannot be created or destroyed?

it's part of a crossword puzzle so it should contain the following

o-2nd letter
s-4th letter
a-8th letter
m-10th letter

There are weak or strong attractive forces between atoms of liquids with a high viscosity

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.